LunarPresentation/Expressions/PictureBox.cs

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using System;
using System.IO;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Xml;
using Microsoft.Win32;
using SHomeWorkshop.LunarPresentation.Interfaces;
using SHomeWorkshop.LunarPresentation.Widegets;

namespace SHomeWorkshop.LunarPresentation.Expressions
{
    public class PictureBox : Expression, ICollapsed
    {
        public PictureBox(SubPanel rootPanel, SubPanel parentPanel, Editor editor)
            : base(rootPanel, parentPanel, editor)
        {
            img = new Image();
            img.SnapsToDevicePixels = true;
            img.Cursor = System.Windows.Input.Cursors.Hand;

            img.MouseRightButtonDown += new System.Windows.Input.MouseButtonEventHandler(img_MouseRightButtonDown);
            img.PreviewMouseLeftButtonDown += new System.Windows.Input.MouseButtonEventHandler(img_PreviewMouseLeftButtonDown);
            img.MouseLeftButtonDown += new System.Windows.Input.MouseButtonEventHandler(img_MouseLeftButtonDown);
            img.MouseLeftButtonUp += new System.Windows.Input.MouseButtonEventHandler(img_MouseLeftButtonUp);

            img.Source = PictureBox.defaultBitmap;
            RenderOptions.SetBitmapScalingMode(img, BitmapScalingMode.NearestNeighbor);

            this.mainBorder.Child = img;

            this.chineseName = "图片框";
        }

        static PictureBox()
        {
            defaultBitmap = new BitmapImage(new Uri("pack://application:,,,/LunarPresentation;component/Resources/Icons/Question.png"));
        }

        public static System.Windows.Media.Imaging.BitmapImage defaultBitmap;

        void img_MouseLeftButtonUp(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            // 接收拖动来的公式。
            Globals.DropExpression(this);
        }

        void img_PreviewMouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            if (e.ClickCount == 2)
            {
                LoadImageFromFile();
                e.Handled = true;
            }
        }

        void img_MouseLeftButtonDown(object sender, System.Windows.Input.MouseButtonEventArgs e)
        {
            if (Editor == null) return;